#666AE3#666AE3

#666AE3 is a mid, vivid blue. Relative luminance 0.187; OKLCH L 58.4% C 0.180 H 277.8°. Best body text is #000000 at 4.74:1 contrast (WCAG AA passes).

Color values

HEX	#666AE3
RGB	rgb(102, 106, 227)
HSL	hsl(238, 69%, 65%)
HSV	hsv(238, 55%, 89%)
CMYK	cmyk(55.1%, 53.3%, 0%, 11%)
CIE-LAB	lab(50.31, 32.38, -62.28)
CIE-LCH	lch(50.31, 70.20, 297.47°)
OKLab	oklab(58.44% 0.0245 -0.1782)
OKLCH	oklch(58.44% 0.18 277.8)
XYZ	xyz(24.4943, 18.6773, 74.9725)
Luminance	0.1868 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666AE3 #E3DF66

analogous

#66A9E3 #666AE3 #A166E3

triadic

#666AE3 #E3666A #6AE366

tetradic

#666AE3 #E366A9 #E3DF66 #66E3A1

square

#666AE3 #E366A9 #E3DF66 #66E3A1

split-complementary

#666AE3 #E3A166 #A9E366

monochromatic

#2025AF #3238DA #666AE3 #9A9CEC #CDCFF6

Accessibility & contrast

On white

4.43

#666AE3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.74

#666AE3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666AE3

4.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666AE3	#FFFFFF	#000000	##000000
##666AE3	1.00	4.43	4.74	4.74
#FFFFFF	4.43	1.00	21.00	21.00
#000000	4.74	21.00	1.00	1.00
##000000	4.74	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#207DE7

Deuteranopia (green-blind)

#0073E0

Tritanopia (blue-blind)

#25869C

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #666ae3;
/* rgb */ color: rgb(102, 106, 227);
/* oklch */ color: oklch(58.4% 0.180 277.8);

Tailwind

colors: {
  custom: {
    50: '#9b94ec',
    500: '#666ae3',
    950: '#000000',
  },
}

SCSS

$custom: #666ae3;
$custom-light: #9b94ec;
$custom-dark: #000000;

JSON

{
  "hex": "#666ae3",
  "rgb": {
    "r": 102,
    "g": 106,
    "b": 227
  },
  "hsl": {
    "h": 238.08,
    "s": 69.061,
    "l": 64.51
  },
  "oklch": {
    "l": 0.58443,
    "c": 0.17993,
    "h": 277.8
  },
  "luminance": 0.18679
}

Semantic roles & 50–950 ramp

primary

#666AE3

secondary

#E8E7BD

accent

#CB14D1

background

#FAF9FE

surface

#F4F1FD

border

#CECBD5

text

#0F0D16

muted

#7F7E84

Preview Lab

Preview with #666AE3

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →